Machine for making rivets and the like



F. R. LONG MACHINE FOR MAKING RIVETS AND THE LIKE Filed Feb. 21. 1924 3 Sheets5heet l Nov. 24, 1925- F. R. LONG MACHINE FOR MAKING RIVETS AND THE LIKE Filed Feb, 21. 1924 5 Sheets-Sheet 2 F. R. LONG MACHINE FOR MAKING RIVETS AND THE LIKE Nov. 24. 1925- Filed Feb. 21. 1924 aSheets-Sheet 3 gnwmtoz l atented Nov. 24, 1925.

UNITED STATES PATENT OFFICE.

FRED R. LONG, OF CATAWISSA, PENNSYLVANIA, ASSIGNOR T CENTRAL FORGING- COMPANY, OF CATAVJISSlA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

MACHINE FOR IMAKING RIVETS AND THE LIKE.

Application file d February To all 107mm it may concern:

Be it known that I, Faro R. LoNe, citizen of the United States, residing at Catawissa, in the county of Columbia and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Making Rivets and the like, of which the following is a specification.

This invention relates to an improvement in machines for making bolts, rivets, and like headed fastening devices.

A primary object of the invention is to provide a simplified construction and arrangement which materially reduces the number of parts necessary to the operation of the machine, and also provides for more directly and economically utilizing the power. ItilGTOiZOfOIG, it has been the general practice to arrange the main operating shaft in machines of this character at right angles to the line of operation of the upsetting instrumentalities, thereby requiring the use of a multiplicity of knuckle joints, and other connections for also operating the blank gripping and clamping elements from the main drive shaft. Not only are machines of this type expensive to build but by reason of the multiplicity of parts provide many places for wear which must be taken up or compensated for in order that the machine may properly function without loss or waste. Frequently, maintenance of proper standards of accuracy requires the re ilacement of many parts, thereby making the item of up hoop a considerable factor in the cost of producin g the a rt icle.

The present invention, therefore, has primarily in view overcoming many of the difliculties heretofore encountered in connection with machinery of this character; and, as a more specific object, conten'iplates utilizing a single drive shaft for operating both the upsetting means and the means for gripping the blank or stock to be headed or upset.

A further object of the invention is to provide a construction which reduces the parts subjected to the greatest wear to the minimum and also provides means for accurately taking up, and adjusting the parts upon which wear cannot be avoided.

lVith the above and other objects in view which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction,

21, 1924. Serial No. 694,334.

combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of the invention is shown in the accompanying drawings, in which:

Figure 1 is a top plan view of the improved machine.

Figure 2 is a vertical-cross sectional view taken on the line 22 of Fig. 1.

Figure 3 is a vertical cross sectional view taken on the line 33 of Fig. 1.

Figures at and 5 are detail elevations of the main driving shaft, Fig. 5 being taken at an angle of 90 to Fig. at.

Figure 6 is a detail plan view of the gripping aw member.

Figures 7 and 8 are perspective views of the compensating portions of the gripping member which prevent jamming of the same if the movement of the jaw is accidentally obstructed.

Similar reference characters designate corresponding parts throughout the several figures of the drawings.

In carrying the invention into effect it is proposed to provide a main or bed frame designated generally as F which may be supported by the legs or standards S and has slidably mounted therein a gripping jaw member designated generally asA, and an upsetting member operating at right angles thereto and designated generally as B. Both of said members A and B are actuated from a common actuating shaft 0 which is obliquely disposed with reference to the line of movement of both members, and when considered in connection-with such line the said shaft forms the diagonal of a triangle.

In its general'aspect therefore the present invention'includes the gripping jaw member A. and the upsetting member B operated directly from a common power shaft C, through a series of novel cams, which will be presently explained more in detail, whereby the timing and sequence of the operation of members A- and B will be accurately preserved under all conditions of use.

Referring first to the gripping member A it will be observed, more particularly from Figures 1 and 3, that the same comprises a main body 1 including a front portion 2 which is provided with a chamber 3 as clearly shown in Figure 6 while the portion 4 thereof constitutes a movable gripping jaw adapted to cooperate with a stationary gripping jaw to grip the blank or stock supplied to the machine through the feed opening 6 in the feed plate 7 (see Fig. The hollow forward portion 2 of the gripping member A is connected with the rear portion 8 by a yoke 9 so that the cam 10' also on the main operating shaft C will recipro cate the member A in proper synchronism with the member B.

In connection with the member A however, it is pointed out that the hollow front portion 2 thereof. is preferably provided with a compensating coupling which will prevent damage to the cams and to the main shaft as well to the member itself in event that a tool or other obstruction should fall between the jaws 1 and 5 while the machine is in operation. To that end the chamber 2 receives a buffer block 11 which is recessed at 12 and tapered as indicated at 1.8 to thereby receive a yieldingly mounted coupling member H. clearly shown in Figs. 3 and 8, and consisting of a body having the opposite sides 15 thereof tapered as shown so that one edge will cooperate with the inclined face 13 of the block 11 while the opposite edge thereof will engage with the inclined wall 16 in the chamber 3 of the body 1. he coupling 14 is held in its normal locked position by the yielding tensioning effect of the spring 17 carried by an adjustable bolt 18 as clearly shown in Fig. 3, the tension of the spring 17 being sutliciently strong to maintain the coupling 14: seated against the faces 13 and 16 thereby to properly reciprocate the entire men'iber A as the cam 10 rotates. However, if a tool or other obstruction should accidentally fall between the jaws 4: and 5 and the aw 4- is resisted in its forward ,n'iovement, the coupling 14 will be forced upwardly on the inclined faces 13 and 16 and thus permit the part 11 to yield under the rotation of the cam 10 without causing the shaft C to be locked or otherwise. damaging the gripping member A.

As shown in Fig. 3 the parts 8 and 11 are provided with theadjustable wear liners w for the purpose of permitting the take up of. such wear as may occur between the cams and the contacting faces of the shoes.

The upsetting member includes the body sections 19 and 20 connected by a yoke portion 21, of the front l'iody section 19 carrying an upsetting die 22 of any suitable and desired character according to the work to be performed. Asshow'n in Fig. 2 the inner faces of the sections 1 and 2 are also provided with adjustable \vear liners w so that wear which would otherwise be imposed on the sections 19 and 20 by the cam 23 on the shaft C may be readily taken care of to make the stroke of the upsettitng member A always uniform.

The driving shaft C which carries the cams 10 and 23' may be journalled in any suitable and convenient manner in the bed frame F as indicated at 24, and may be pro vided at one end thereof with a pulley or drive wheel 25. The cam 10 on the shaft C which operates the member A is preferably of the compound type and the surfaces 1 a and 10 thereof are complemental and cooperating faces for actuating the memher A. v

The faces 23, 23" of the cam 23 serve to cooperate to effect the reciprocation of the member B and the face 23 thereof serves to actuate the spring tensioned rod 241 of an ejector device which includes a rocker arm 25 pivoted as at 26 in the front. part of the machine and provided with an ejector finger 27 for entering the feed opening 6 and assisting-in removing the headed article from between the jaws 4 and 5.

The cams 10 and 23 are similar in their general nature each serving to respectively operate the members A and B and also actuate the ejector 27. The faces of these cams are of course specially designed to produce the desired movement on the members with which they cooperate, and may be very easily turned on a suitable lathe.

As shown in Fig. 1 the main operating shaft C is provided at its intern'lcdiate portion with a simple 02111128 which is adapted to cooperate with a roller 29 carried by an arm 30, the said arm being connected to a rock shaft 31 journalled in the frame of the machine as at 32 and carrying at its for ward end a stop member 33 which is adapted to be thrust downward into the path of the blank material as it is fed through the feed opening 6 to limit or stop the movement thereof and form the proper length of the article to be made. For the purpose of insuring the arm following the cam 28' to insure proper timing of the stop the arm 30 is placed under the tension of the spring 35 as shown in Fig. 1.

'From the foregoing it will be apparent that when the machine is in operation the blank stock a? is fed in through the feed opening 6 between the gripping jaws 41 and 5 until it strikes the stop 33. As the main shaft C is in operation and controls the movement of the stop 33 through the cam 28 and roller 29 etc. the stop will promptly jump outof the way after the proper length of stock has been fed to position between the jaws. Then, as the shaft C continues to move through its cycle it will cause the gripping jaw 1 of the member A to move forward due to the engagement of the face 10 of the cam 10 with the part 11 of that member. The cam 10 is so constructed as to maintain the jaws closed while the continued movement of the shaft C will cause the face 23 of the cam 23 to engage with the front section 19 of the member B and push the latter forwardly so that the upsetting die 22 thereof will form a head on the metal blank. As the shaft (l continues to rotate the gripping aw meu'iber A will recede, and, likewise, the upsetting member A will recede, and then the surface 2 c of the cam 23 will operate the ejector mechanism to assist in the removal of the headed blank from the gripping jaws.

From the foregoing it will be obvious that the present. machine includes in its general organization the gripping member A and the upsetting member B operating at right angles to each other and the main driving shaft C disposed obliquely to said members and carrying suitably designed cams 10 and 23 for synchronously operating said members in their proper order. By reason of the provision of the compensating coupling construction in the member A, damage to the machine is avoided if the gripping mechanism meets an unusual obstruction, and by reason of the presence of such construction the operation of both members A and B from a common drive shaft is made entirely feasible and practical.

Vithout further description it is thought that the features and advantages of the in vcntion will be readily apparent to those skilled in the art and it will of course be understood that changes in the form, proportion and minor details of construction may be resorted to Without departing from the spirit of the invention or scope of the appended claims.

I claim 1. A machine of the class described including reciprocatory gripping and upsetting members operating at right angles to each other, and a common actuating shaft disposed obliquely to said members and having means for operating the game.

2. A machine of the class described including a. gripping member and an upset-ting member mounted to operate at right angles to each other, a common actuating shaft ar ranged obliquely to said members and having separate cams thereon for synchronously operating the gripping and upsetting memers.

A machine of the class described ineluding gripping and upset-ting members arranged to operate at right angles to each other, said members each including a yoke portion, cams adapted to operate in said yoke portions to effect the reciprocation of each member and a common driving shaft arranged obliquely to said members for operating said cams.

4. A machine of the class decribed including a gripping member and an upsetting member operating at right angles to each other and each including a yoke portion, cams operating in said yoke portions and reciprocating said members, and a single shaft carrying both cams and disposed obliquely to the line of reciprocation of each member.

5, A machine of the class described in cluding a gripping member, a cam for reciprocatingsaid gripping member, an upsetting member mounted to reciprocate at right angles to the gripping member, a cam for actuating the upsetting member, a common actuating shaft carrying both cams, a measuring stop shiftably mounted to move into and out of the path of a portion of the upsetting means, and means for operating said measuring stop from the main actuating shaft.

6. A machine of the class described ineluding gripping and upsetting members arranged to reciprocate at right angles to each other, a single actuating shaft having cams thereon for synchronously reciprocating said members, ameasuring stop device consisting of an arm adapted to be shifted into and out of the path of movement of a portion of the upsetting member, a rock shaft carrying said arm, and means operated by a cam on the intermediate portion of the main operating shaft for operating said rock shaft.

In testimony whereof I hereunto a llix my signature.

FRED R. LONG.

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